Edward f



No. 748,816. PATENTED JAN. 5,1904.

, E. RTERRY. RIVET HOLDER.

APPLICATION FILED MAYIQ, 1902.

lllllll n tion.

Patented January 5, 1904.

PATE T OFFICE.

EDWARD F. TERRY, OF NEW YORK, N. Y.

RlVET-HOLDER.

SPECIFICATION forming part of Letters Patent No. 748,816, dated January5, 1904.

Application filed May 19, 1902. Serial No. 107,971. (No model.)

To all whom it may concern:

Be it known that I, EDWARD F. TERRY, a citizen of the United States, anda resident of the city of New York, borough of Manhat- Ian, county andState of New York, have invented a Rivet and Hammer Holder, of which thefollowing is aspecification.

In the accompanying drawings, Figure 1 is a side view of a pneumatichammer with my rivet-holder attached, with the cylinder 13longitudinally sectioned. Fig. 2 is a front View of the same with theham mer-head, the set, and the material-being riveted in section. Fig. 3is a top View of my rivet-holder detached from the hammer. Fig. 4 is ahori zontal section of my rivet-holder detached from the hammer, theplane of section being through the air-passages 15. In Figs. 3and 4 thespace or position occupied by the hammer is lettered A.

N o detailed description of the hammer proper is necessary, since it iswell known as consisting of a member 1, adapted to transmit to the rivet2 the force of blows received from suitable pneumatically-operatedmechanism in the casing 3, there being at the top of saidcasing a handle4, through which the air is transmitted from asupply-pipe 5 under thecontrol of a valve operated by thetrigger 6. i V

The frame of my-rivet-holder is provided with collars 7 and 8, which areadapted to fit around the casing of the hammer and support theattachment thereon-. The collar 8 is preferably supplied with a swingingfront 9, pivoted at 10 and secured at the opposite end ,by a thumb-screw11, so as to operate as a gate, the opening of which will enable theattachment to be dismounted from the hammer-casing. Upon opposite sidesof the collars 7 and 8 are mounted the vertical cylinders 12 and. 13,axially parallel with and on diametrically opposite sides of thecylinder of the hammer when occupyingthe space A. These two cylindersare of similar construc- The following description of one thereforeanswers for a description of both.

14 is a removable cylinder-head. 15 is an air-port into the upperportion of the cylinder from the airpassage 16, extending through thebracket 17 from one cylinder to the other. 31 is the piston of thecylinder,

the piston-rod 32 of which projects downwardly, so as to bear againstthe upper portion of the material to be riveted.

33 is a coiled spring tending to elevate the piston-rod 32. The twopiston-rods 32 32 of the cylinders 12 and 13, respectively, bear againstthe material to be riveted on opposite sides of the rivet, as shown inFig. 2.

'18 is a pipe leading from the compressed air-supply pipe 5 to thepassage 16, controlled by the hand-operated valve 19, which is athree-way valve adapted to connect the pipe 18 with the supply-pipe 5for pressure or with the open air for exhaust.

20 is a port from the passage 16 into the cylinder 21 at the upperportion thereof.

20 is a valve operated by the handle 20*, whereby the port 20 may be cutofi from the passagelfi, if desired.

22 (shown in dotted lines in Fig. 1) is the piston of said cylindersecured to the pistonrod 23, fixed to the stud 24:, projecting from theham mer-casing..

25 25 are a pair of lugs extending downwardly from the bottom of thecylinder 21, between which is secured'by the bolts 26 26 the upper endof the yoke 27, carrying at its lower end a set 28, adapted to holdupthe head of a rivet. This yoke is provided with a hand-opening29, sothat the portion 30 of the yoke and the portion 4 of the hammer affordhandles whereby the operator can successfully and conveniently place thecombiued structure in position.

From the above description it will be seen i that the outfit consists ofthe hammer, which may be of any suitable construction, and a holding-onor setting device whereby the rivet is set or held in position to beriveted by the hammer. In the preferable form shown the set 28, whichholds the head of the rivet, and the points at which the clampingmembers 32 32 impinge against the material are sub stantially at theangles of an invented isosceles triangle, in the base-line of which theriveting member 1 of the hammer lies. This relative position of the fourpoints at which the rivet and riveted material are held and acted uponsecures a perfect balance of forces, assuring precision.

The operator holds the combined structure so that the set and hammer arein line with the rivet intended to be driven. The valve 19 is thenopened, admitting compressed air into the passage 16, from which itpasses into the cylinders 12, 13, and 21. The action of the air againstthe piston 22 forces the set 28, carried by the yoke 27, against thehead of the rivet. The pressure of the air against the pistons 31 forcesthe lower ends of the piston-rods 32 32 against the surface of thematerial, and thus draws the rivet up into place and holds it securelyuntil it is driven by the hammer. The operator causes the hammer tooperate by pressing upon the trigger 6. As soon as the operation iscomplete the operator releases the trigger 6 and turns the valve 19 intoposition to exhaustfrom the pipe 18 and passages connected therewith,which permits the coil-springs 33 to raise the clamping members 32 32and also permits the piston 22 to rise in the cylinder 21, so that thewhole clamping attachment drops to a lower position on the hammer-casing and permits the set 28 to drop off of the rivet-head, thuspermitting the removal of the whole tool.

Although I have described my attachment as applied to a pneumatichammer, I do not wish to limit myself to its operation by air, since Iam aware that other fluids might be employed.

Since the hammer is complete without the clamp and the clamp completewithout the hammer and the two are detachably secured together, the samehammer may be used with or without the clamp, or different hammers maybe used from time to time with the. same clamp, or the clamp may beplaced and secured in position preparatory to the insertion of thehammer. Moreover, since the two clamping members 32 32 are eachpneumatically operated from a separate cylinder the relative position ofthe two is automatically adjustable to accommodate any difference inthickness or form in the material being riveted on opposite sidesof therivet.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. In combination, a gas-operated rivetinghammer, aset whereby the head of the rivet is held during the operation, a pairof clamping members arranged on the same side of the material with thehammer and, respectively, on opposite sides of the hammer and meanswhereby said set and clamping members are operated inversely to eachother.

2. In a rivet-clamping device, in combination, the cylinders 12, 13 and21, the pistons therein,and clamping devices connected with said pistonsand impinging, respectively,

against the rivet and against the material being riveted.

3. In a rivet-clamping device, in combination with a frame containing aset 28, and formed with a hammer-holding space A and the cylinders 12,13, and 21 grouped around said space, of a valve in said cylinder 21,pistons in said cylinders 12 and 13 and clamping devices connected withsaid pistons and adapted to impinge upon the material being riveted.

4. A yoke and a set on one end thereof, in combination with thefollowing mechanism mounted on the opposite end of said yoke, viz: ahammerholder, two independent clamping members and means yieldinglypressing said clamping members forward whereby their position isautomatically adjusted.

5. A yoke and a set on one end thereof, in combination with thefollowing mechanism on the opposite end of said yoke, viz: ahammerholder,two pneumatic cylinders independent of the hammer-holderand a clamping member operated from each of said cylinders.

6. A rigid yoke and a'set rigidly mounted on one end thereof, incombination with the following mechanism on the other end thereof, viz:a rigidlymounted hammer casing and an independent yieldingly-mountedclamping member; whereby the blows of the hammer are delivered from acasing rigid with the set but the distance between the clamping memberand the set is automatically controlled by the surface of the material.

7. A yoke and a set rigidly mounted on one end thereof, in combinationwith the following mechanism on the other end thereof, viz: a pneumaticcylinder, a clamping member yieldingly operated therefrom and ahammer-case em bracing socket at one side of said cylinder.

8. A rivet-holding clamp containing, in combination, a yoke, a set onone end thereof and on the other end thereof two clamping-pistons andseparate cylinders whereby said pistons are actuated. I

9. A yoke and a set on one end thereof, in combination with thefollowing mechanism mounted on the opposite end of said yoke, viz: apneumatic hammer, an independent pneumatic cylinder, a clamping memberoperated from said cylinder, a gas-supply pipe and pipes branchingtherefrom, respectively to said hammer and said cylinder.

In testimony whereof I have signed my nesses.

EDWARD F. TERRY. Witnesses:

H. L. REYNOLDS, WALTER A. PAULING.

IIC

I name in the presence of two subscribing wit-

